Error: "gzip decompression failed: unexpected EOF" when ingesting logs in Panther

Last updated: July 9, 2025

QUESTION

I've been getting errors like this gzip decompression failed: unexpected EOF for my S3 log source. How can I fix it?

ANSWER

This error usually occurs if the file being processed is either incomplete, incorrectly uploaded to the S3 bucket, or has integrity issues. To resolve this, follow these steps:

  • Verify that the file is complete and properly formatted.

  • Re-upload the file to ensure it is correctly uploaded to the S3 bucket.

If the issue persists, please share a copy of the file with our support team for further investigation. Be sure to redact any private or sensitive information before sending.